RaySollium99/picodrive
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some irq hacks

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notes to self (derived from Nemesis):

H32: 0x10A .. 0x127 0x1D2 .. 0x1FF 0x000 0x001
pclk       30             46          1 |0x109
mclk                 770                | 2650   = 3420
68kclk              110                   378.5 ~= 488.5

H40: 0x14A .. 0x16C 0x1C9 .. 0x1FF 0x000 0x001
pclk       35             55          1
mclk     35*8       4*8+314+10+19*8     |0x149*8
                  788                   | 2632   = 3420
68kclk           112.5                    376   ~= 488.5
This commit is contained in:
notaz 2017-10-07 00:08:05 +03:00
parent e015ad3c1b
commit 22814963cc
5 changed files with 39 additions and 38 deletions
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19
pico/videoport.c
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@ -357,10 +357,10 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
{
struct PicoVideo *pvid=&Pico.video;
//if (Pico.m.scanline < 224)
// elprintf(EL_STATUS, "PicoVideoWrite [%06x] %04x", a, d);
a&=0x1c;
//elprintf(EL_STATUS, "PicoVideoWrite [%06x] %04x [%u] @ %06x",
// a, d, SekCyclesDone(), SekPc);
a &= 0x1c;
switch (a)
{
case 0x00: // Data port 0 or 2
@ -383,8 +383,8 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
pvid->lwrite_cnt -= use;
if (pvid->lwrite_cnt < 0)
SekCyclesLeft = 0;
elprintf(EL_ASVDP, "VDP data write: %04x [%06x] {%i} #%i @ %06x", d, Pico.video.addr,
Pico.video.type, pvid->lwrite_cnt, SekPc);
elprintf(EL_ASVDP, "VDP data write: [%04x] %04x [%u] {%i} #%i @ %06x",
Pico.video.addr, d, SekCyclesDone(), Pico.video.type, pvid->lwrite_cnt, SekPc);
}
VideoWrite(d);
@ -451,14 +451,15 @@ update_irq:
// update IRQ level
if (!SekShouldInterrupt()) // hack
{
int lines, pints, irq=0;
int lines, pints, irq = 0;
lines = (pvid->reg[1] & 0x20) | (pvid->reg[0] & 0x10);
pints = (pvid->pending_ints&lines);
pints = pvid->pending_ints & lines;
if (pints & 0x20) irq = 6;
else if (pints & 0x10) irq = 4;
SekInterrupt(irq); // update line
if (irq) SekEndRun(24); // make it delayed
// this is broken because cost of current insn isn't known here
if (irq) SekEndRun(21); // make it delayed
}
#endif
}
@ -521,7 +522,7 @@ PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
pv->pending = 0; // ctrl port reads clear write-pending flag (Charles MacDonald)
elprintf(EL_SR, "SR read: %04x @ %06x", d, SekPc);
elprintf(EL_SR, "SR read: %04x [%u] @ %06x", d, SekCyclesDone(), SekPc);
return d;
}